EcoFlow DELTA 2 Max vs EcoFlow DELTA 3 Max
EcoFlow DELTA 2 Max
EcoFlow DELTA 3 MaxThe DELTA 2 Max accepts 100% more solar input, and that is the gap worth deciding on: it refills faster off-grid on a good day. They are level on capacity and AC output. Scored across this catalogue they land at 7.2 and 7.7 out of 10.
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EcoFlow DELTA 3 MaxIt leads by 13% on weight and 18% on wall recharge time. That is the combination most people are actually choosing between.
Check price on AmazonEcoFlow DELTA 2 MaxIt leads by 100% on maximum solar input. Those are the axes to buy it for, and the only ones.
Check price on AmazonThe specifications side by side
| Specification | DELTA 2 Max | DELTA 3 Max |
|---|---|---|
| Score | 7.2/10 | 7.7/10 |
| Capacity | 2,048 Wh | 2,048 Wh |
| AC output | 2,400 W | 2,400 W |
| Surge | 4,800 W | 4,800 W |
| Cell chemistry | LFP | LFP |
| Cycle life | 3,000 cycles to 80% | Not published |
| Wall recharge | 1.3 hours | 1.1 hours |
| Max solar input | 1,000 W | 500 W |
| UPS switchover | No UPS function | 10 ms |
| Weight | 50.0 lb (23.0 kg) | 44.8 lb (20.3 kg) |
| Extra batteries | Expandable to 6,144 Wh | Expandable to 10,000 Wh |
The rows worth your attention are the ones where the gap is large enough to change a decision. On this pair that means maximum solar input and weight. Everything else is close enough to ignore.
Where they really separate: maximum solar input
This is the one gap large enough to decide the question. The DELTA 2 Max comes out 100% ahead on maximum solar input, and the reason that matters is practical rather than arithmetic.
Maximum solar input sets how fast the pack refills off-grid on a good day. The voltage window matters as much as the wattage, since it decides which panels can be wired at all.
The other differences, in order of size
- Weight. The DELTA 3 Max leads by 13%.
- Wall recharge time. The DELTA 3 Max leads by 18%.
None of these is decisive on its own. Taken together they describe two units built to slightly different briefs, which is worth knowing before you choose on the headline figure alone.
What each one will run
Same arithmetic for both: usable watt hours after an assumed 85% inverter efficiency, divided by average draw rather than peak.
EcoFlow DELTA 2 Max
| Appliance | Typical draw | Estimated run time |
|---|---|---|
| Fridge | 120 W | 41 h 27 min |
| CPAP machine | 45 W | 38 h 41 min |
| Router and modem | 15 W | 116 h 3 min |
| Television | 90 W | 19 h 21 min |
| Microwave | 1200 W | 1 h 27 min |
EcoFlow DELTA 3 Max
| Appliance | Typical draw | Estimated run time |
|---|---|---|
| Fridge | 120 W | 41 h 27 min |
| CPAP machine | 45 W | 38 h 41 min |
| Router and modem | 15 W | 116 h 3 min |
| Television | 90 W | 19 h 21 min |
| Microwave | 1200 W | 1 h 27 min |
For your own appliance and its real wattage, the run time calculator shows the assumptions on screen and lets you move them.
Common questions
Is the DELTA 2 Max or the DELTA 3 Max better value?
This site does not print prices, because a stale price is worse than none. Check both on Amazon, then weigh the gap against the differences above. A 100% lead on maximum solar input is worth paying for only if that axis matters to your use.
Can I compare their surge ratings directly?
Not always. BLUETTI's Lifting Power and EcoFlow's X-Boost run appliances above rated output by lowering voltage, which suits a kettle or a heater but not a motor or a computer. A conventional surge rating means something else: a brief tolerance for start-up current. The table keeps each maker's own label attached.
Is the newer one simply a better version?
Not automatically. Makers revise units to hit a different price or size, and a newer model sometimes drops something the older one had. Read the table rather than the generation number.